Method and apparatus for overwriting data on recording-medium and the recording medium

• US 20050286368A1
• Filed: 06/22/2005
• Published: 12/29/2005
• Est. Priority Date: 06/23/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Wan, Park, Yong Cheol
• Granted Patent: US 7,675,829 B2
• Time in Patent Office: Days
• US Class Current: 369/47.13
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2020/10907 using pseudo-overwriting, i.e. virtually or logically overwriting data on WORM media by remapping recorded blocks to alternate areas
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/036 Insert-editing
• CPC Class Codes: G11B 7/0045 Recording G11B7/006, G11B7/0065 take precedence
• CPC Class Codes: G11B 7/00736 Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082

Abstract

In an embodiment of the method of over-writing a recording medium, if data for writing on the recording medium is to be written on a recorded portion of a user data area of the recording medium, an unrecorded portion of the recording medium is selected as a replacement portion for recording the data and the data is recorded in the replacement portion.

Claims

1. A method of over-writing a recording medium, comprising:

determining if data for writing on the recording medium is to be written on a recorded portion of a user data area of the recording medium;

selecting an unrecorded portion of the recording medium as a replacement portion for recording the data if the determining step determines the data is to be written on a recorded portion of the user data area; and

recording the data in the replacement portion if the determining step determines the data is to be written on a recorded portion of the user data area.

2. The method of claim 1, wherein the selecting step selects an unrecorded portion of the user data area of the recording medium as the replacement portion.

3. The method of claim 2, wherein the selecting step accesses management information from a management area to determine unrecorded portions of the user data area.

4. The method of claim 2, wherein the selecting step determines a beginning of the replacement portion as a beginning of a cluster in the unrecorded portion of the user data area.

5. The method of claim 1, wherein

the user data area is divided into a number of recording areas;

and

the selecting step selects an unrecorded portion of a recording area as the replacement portion.

6. The method of claim 5, wherein the recording areas are each for sequentially recording data.

7. The method of claim 5, wherein the selecting step accesses management information from a management area to determine unrecorded portions of the recording areas.

8. The method of claim 5, wherein

the selecting step selects an unrecorded portion in the recording area including the recorded portion as the replacement portion if the recording area including the recorded portion is available for recording.

9. The method of claim 8, wherein the recording area including the recorded portion is available for recording if the recording area including the recorded portion has a status of open for recording.

10. The method of claim 9, wherein the selecting step accesses management information from a management area to determine if the recording area including the recorded portion has a status of open for recording.

11. The method of claim 10, wherein the management information indicates a status for each recording area, each status indicating whether an associated recording area is open for recording.

12. The method of claim 9, wherein the recording area including the recorded portion is available for recording if the recording area including the recorded portion has a status of open for recording and includes an unrecorded portion large enough to store the data.

13. The method of claim 12, wherein the selecting step accesses management information from a management area to determine if the recording area including the recorded portion has a status of open for recording, and, if the recording area including the recorded portion is open for recording, the management information indicates a last recorded address for the recording area, and the selecting step accesses the last recorded address to determine if the recording area including the recorded portion includes an unrecorded portion large enough to store the data.

14. The method of claim 13, wherein if the recording area including the recorded portion is available for recording, the selecting step determines a next write address to begin recording the data as a beginning of a first cluster following the last recorded address for the recording area including the recorded portion.

15. The method of claim 12, wherein the selecting step selects an unrecorded portion of a recording area, which is different from the recording area including the recorded portion, if the recording area including the recorded portion is unavailable for recording.

16. The method of claim 8, wherein the selecting step selects an unrecorded portion of a recording area, which is different from the recording area including the recorded portion, if the recording area including the recorded portion is unavailable for recording.

17. The method of claim 16, wherein the recording area including the recorded portion is unavailable for recording if the recording area including the recorded portion has a status of closed for recording.

18. The method of claim 17, wherein the selected recording area is a recording area nearest the recording area including the recorded portion.

19. The method of claim 17, wherein the selecting step accesses management information from a management area to determine if the recording area including the recorded portion has a status of closed for recording.

20. The method of claim 19, wherein the management information indicates a status for each recording area, each status indicating whether an associated recording area is closed for recording.

21. The method of claim 16, wherein the recording area including the recorded portion is unavailable for recording if the recording area including the recorded portion does not include an unrecorded portion large enough to store the data.

22. The method of claim 21, wherein

the management information indicates at least a starting sector of each recording area, and for recording areas having a status of open for recording, the management information indicates a last recorded address for the recording area;

and

if the recording area including the recorded portion is open for recording, the selecting step determines whether an unrecorded portion of the recording area including the recorded portion is large enough to record the data based on the management information.

23. The method of claim 5, wherein the selecting step selects an unrecorded portion of a recording area, which is different from the recording area including the recorded portion.

24. The method of claim 23, wherein the selected recording area is a recording area nearest the recording area including the recorded portion.

25. The method of claim 1, wherein

the recording medium includes the user data area and at least one spare area;

and

the selecting step selects an unrecorded portion of the spare area as the replacement portion.

26. The method of claim 25, further comprising:

recording data in the user data area in a random recording mode.

27. The method of claim 1, wherein the determining step accesses management information recorded in a management area of the recording medium to determine if the data for writing on the recording medium is to be written on a recorded portion of the user data area of the recording medium.

28. The method of claim 27, wherein the user data area is divided into a number of recording areas for sequential recording of data, and the management information indicates a starting sector for each recording area, indicates whether each recording area is open for recording, and for each recording area open for recording, indicates a last recorded address of the recording area.

29. The method of claim 28, wherein the determining step determines that the data for writing on the recording medium is to be written on a recorded portion of a user data area of the recording medium if the recording area in which the data is to be written is closed for recording.

30. The method of claim 28, wherein the determining step determines that the data for writing on the recording medium is to be written on a recorded portion of a user data area of the recording medium if the recording area in which the data is to be written is open for recording and a start address for recording the data is less than the last recorded address for the recording area in which the data is to be written.

31. The method of claim 1, further comprising:

recording an entry in a management area of the recording medium, the entry indicating a location of the recorded portion and a location of the replacement portion.

32. The method of claim 31, wherein the entry at least indicates a first sector of the recorded portion and a first sector of the replacement portion.

33. The method of claim 31, further comprising:

recording at least one entry in the management area of the recording medium, the entry for defect management indicating a location of a defective portion of the user data area and a location of the recording medium replacing the defective portion.

34. The method of claim 1, wherein the recording medium is a write-once recording medium.

35. A method of over-writing a recording medium, comprising:

accessing management information recorded in a management area of the recording medium, the management information indicating a number of recording areas for sequential recording into which a user data area of the recording medium is currently divided, indicating a starting sector of each recording area, indicating a status of each recording area, and for each recording area having a status of open for recording, indicating a last recorded address;

determining if data for writing on the recording medium is to be written on a recorded portion of one of the recording areas based on the management information;

selecting, based on the management information, an unrecorded portion of one of the recording areas as a replacement portion for recording the data if the determining step determines the data is to be written on a recorded portion of one of the recording areas; and

recording the data in the replacement portion.

36. The method of claim 35, wherein the selecting step selects the recording area including the recorded portion if the recording area including the recorded portion is available for recording the data, and selects another recording area available for recording if the recording area including the recorded portion is unavailable for recording the data.

37. The method of claim 35, further comprising:

updating the management information after recording the data.

38. The method of claim 35, wherein the recording medium is a write-once recording medium.

39. A method of recording a data structure on a recording medium for managing over-writing of the recording medium, comprising:

storing an entry in a management area of the recording medium if a recorded portion of a user data area on the recording medium is to be over-written with data, the entry indicating the recorded portion and a replacement portion of the recording medium, the replacement portion for storing the data.

40. The method of claim 39, wherein the entry at least indicates a first sector of the recorded portion and a first sector of the replacement portion.

41. The recording medium of claim 39, wherein the replacement portion begins at a beginning of a cluster.

42. The method of claim 39, wherein the replacement portion is in the user data area.

43. The method of claim 42, wherein

the user data area is divided into a number of sequential recording areas for sequential recording;

and

the recorded portion and the replacement portion are in a same sequential recording area if the recording area is available for recording.

44. A method of reading data from a user data area of a recording medium, comprising:

accessing management information in a management area of the recording medium, the management information including at least one entry, the entry indicating a first recorded portion of the user data area and a second recorded portion of the user data area, the second recorded portion including data for over-writing data in the first recorded portion; and

reading data from the second recorded portion when an instruction for reading data from the first recorded portion is received.

45. An apparatus for recording data on a recording medium, comprising:

a driver configured to record data on the recording medium; and

a controller configured to receive an instruction for writing data on a user data area of the recording medium, configured to determine if the data for writing on the recording medium is to be written on a recorded portion of the user data area of the recording medium, configured to select an unrecorded portion of the recording medium as a replacement portion for recording the data if the controller determines the data is to be written on a recorded portion of the user data area, and configured to control the driver to record the data in the replacement portion.

46. An apparatus for reading from a recording medium, comprising:

a driver configured to reproduce data from the recording medium; and

a controller configured to access management information in a management area of the recording medium, the management area for including at least one entry, the entry indicating a first recorded portion of a user data area and a second recorded portion of the user data area, the second recorded portion including data for over-writing data in the first recorded portion, and

the controller configured to control the driver to read data from the second recorded portion when an instruction for reading data from the first recorded portion is received.

47. A recording medium having a data structure for managing over-writing of data on the recording medium, comprising:

a management area for storing at least one entry, the entry for indicating a recorded portion of a user data area of the recording medium that was to be over-written with data and for indicating a replacement portion of the user data area storing the data for over-writing.

48. A recording medium having a data structure for managing over-writing of data on the recording medium, comprising:

a management area for storing at least one entry, the entry indicating a first recorded portion of the user data area and a second recorded portion of the user data area, the second recorded portion including data for over-writing data in the first recorded portion.